Message type: E = Error
Message class:  IWB_MPS - Messages for Multi-Product Support 
Message number: 134
Message text: Only direct subnodes of release &1of enhancement &2 can be deleted
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The SAP error message IWB_MPS134 indicates that there is an issue with trying to delete a node in the context of an enhancement or release. Specifically, it states that only direct subnodes of a particular release and enhancement can be deleted. This typically occurs in the context of SAP Gateway or OData services when working with the data model.
Cause: The error is caused by an attempt to delete a node that is not a direct subnode of the specified release and enhancement. In SAP, the data model is structured in a hierarchy, and only certain nodes can be manipulated (deleted, in this case) based on their relationship to the parent nodes.
Solution: To resolve this error, you can take the following steps: Check Node Hierarchy: Verify the hierarchy of the nodes you are trying to delete. Ensure that the node you are attempting to delete is indeed a direct subnode of the specified release
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